Datasheet

MAX1407/MAX1408/MAX1409/MAX1414
Low-Power, 16-Bit Multichannel DAS with
Internal Reference,10-Bit DACs, and RTC
38 ______________________________________________________________________________________
Dynamic Input Impedance
When designing with the MAX1407/MAX1408/
MAX1409/MAX1414, as with any other switched-capac-
itor ADC input, consider the advantages and disadvan-
tages of series input resistance. A series resistor
reduces the transient current impulse to the external
driving amplifier. This improves the amplifier phase
margin and reduces the possibility of ringing. The resis-
Figure 15. Initial Power-up, Sleep Mode, and Wake-Up Timing Diagram with AV
DD
>2.7V
t
DFON
SLEEP
WRITE
THREE-STATED
t
DFI
t
DFOF
t
WU
t
DPU
t
DFON
t
DFI
t
DPD
0v
1
2
3
AV
DD
t
DSLP
RESET
(OPEN-DRAIN)
LO
HI
32kHz CLOCK
LO
HI
WU1,WU2
(INT. PULLUP)
LO
HI
CS
LO
HI
DRDY
LO
HI
4
2.7V
SHDN
LO
HI
DOUT
LO
HI
FOUT
(2.4576MHz)
LO
HI
SCLK,
DIN
LO
HI
INT
LO
HI
INITIAL POWER-UP SLEEP MODE WAKE-UP